Bucksaw frame



H. E l HULL July 14, 1953 BUcxsAw FRAME Filed Oct. 22, 1949 2Sheets-Sheet l F/GURE 3 JNVETOR. Henry E. Hul I AGENTS.

H. E- HULL BUCKSAW FRAME 2 snaets'heet 2 INVENTOR. Henry E. Hull MISMMAGENTS.

July 14, 1953 Filed oct. 22, 1949 Patented July 14, 1 953 I Y `l 1,.2545260: A

Henry E. Hull, Worthington, Ohiofasslgor; :by

mesnel`assignmentsg to Rockwell Tools,

; Columbushio, 1a.,.corporationofr0hio ,t appu'eauon october-22,isiafserii iaasiofjf l, `This invention relates Vto a pulpwood 'or buclrsaw, and more particularly to a pulpwood -orA buck saw having a clamp tofastenthe saw blade advantage o-f requiringzforce to flex the frame whenassembling the saw.v `In addition it `was necessaryfto form thespecialloops andtattach them""toe'ach' blade used with'the saw.As -aconsequence, replacement of a. saw blade was not possible withoutspecially prepared elements. l

The object of this invention is to provide `a saw in which Va blade` canbe easily inserted or removed.` A further object is the provision forthe release of tension when the saw is not in use.

With these and other objects in view the invention embodies a clampslidably mounted on a flexible saw frame yand an adjustable fastener forconnecting a saw blade to the `clamp and for tightening the vclamp toprevent movement along the frame. The opposite end of the saw blade maylbe fastened to a similar clamp or may be fastened to the frame by achamfered pin or other pivotal connection. l

For a better understanding of the invention, reference is made to theaccompanying drawings in which like reference characters are used todenote corresponding parts.

Figure 1 is a side elevation of an assembled saw showing therelative-positions of the elements of the improved saw of thisinvention.

Figure 2 is a section taken along the lines 2--2 of Figure 1, showing 'achamfered pin connecting a saw blade to a saw frame.

Figure 3 is a view taken along lines 3-3 of Figure 1, showing the clampfastening a saw blade to a frame.

Figure 4 is a side elevation of another embodiment of the invention.

Referring again to the drawings, Figure 1 illustrates a preferredembodiment of this invention including a saw frame I0, a connecting pinIl, which is used to fasten one end of a saw blade I2 to the frame, anda clamp I3 to connect the free end of the saw blade to the frame.

l The tubular frame Ill is approximately ibow- '1 Claims (CI. L15- 33)`i, l

shapedand flexibler One' end I4 may be flattened and a slot `I5 cut' onthe inside edge. A hole I 8 is drilledlthroughithe flattened portion.

The connecting pinV `Il consists of a head 22 larger in diameter than'the holes I6 in the flattened portion`A I4 of the saw :frame IIJ. Theshank 23 `which is-'shown inV the drawing as chamfered, is soVdimensioned thatV the widest portion will pass through thegholes I6.`The use of ra` chamfered pin` 'is desirablefin 'combination with the:clamp so that when tension is applied to `the saw blade, theflatterznedl portion of the frame will be forced in firm'coritactwiththe sawV blade; Removalofthe'pin is also facilitated bythechamfer;"-However, the scope of the invenshapeofypa l A The :sawr"blade- I2iof fthe type'used in a pulpwood or buck saw, is providedwith a hole at each end for mounting the saw `blade to the frame.

The clamp I3 is designed to fit around the saw frame I0 and slide alongarm II. Flanges I8v extend from one side of the clamp. Through thecenter of the flanges I8 a, hole is drilled.. A screw I9, washer 2l, andwing nut 20 may be used to fasten the saw blade to the clampfand totighten the clamp around the frame arm II, so as to prevent the clampfrom sliding on the frame while the saw is in use. Of course. anysimilar fastening for the clamp may be used, such as a. nut and bolt, orscrew engaging threads in one of the flanges.

To assemble the saw of the embodiment shown in Figure 1, one end of theblade I2 is passed through the slot I5 between the sides of theflattened end I4 of the saw frame IlI until the holes in the frame andsaw blade I6 coincide. The connecting pin II is inserted through theholes. As the blade is tightened the shank 23 of the pin is pressedfirmly 'against the side 4of the holes I6 and the chamfer holds theframe tion is nottobe'limited td theuseof a particular I4 firmly incontact with the blade l2 and the head of the pin 22. The clamp I3 isfitted onto the tubular arm I'l ofthe saw frame I0 and moved along theframe to position `I3 so that the free end of the saw blade I2 may beeasily placed in such a position between the flanges I8 of the clamp I3that the holes'in the clamp and saw blade will coincide. The screw I9 isthen inserted through the holes and secured by the washer 2l and wingnut 20 or similar fastening.

An alternative method of assembling the saw comprises fastening the sawblade I2 to the clamp I3 and sliding the clamp onto the tubular arm I1of the saw frame I0 to the position shown by I3'. The free end of thesaw blade is then placed between the sides of the iiattened end I4 ofthe saw frame, passing through the slots I5 so that the holes I6coincide. The connecting pin II is then inserted through the holes.

To adjust the saw for use the clamp I3 is moved toward the end of arm I1of the saw frame Ill, therebyspringing the frame, andf'tightened by theWingnut ZI) in a position to hold the blade in tension.'

To release tension on the saw blade I2, or to` disassemble the saw, thewing nut 20 is loelll/ and the clamp I3 is moved along the arm II- ofthe saw frame 20 toward thepgsitls. .5375

In the embodiment of the invention shown-. in

Figure 4, both arms I'I-I'I of the saw, frame. IIL

An adjustable cllamprl, 3..i`svl fitted are tubular. onto each of thesaw frame arms, and both of the clamps are moved up to positionISI-|536. The saw blade I2 is ttedfbetween the anges I8 of theclampsandffastenedwith screwsV I0,wash. ers Zhand Wing, nuts@ 0rvSimilar fatennga, The clamps arethen movedK towards-the. ends of theframe arms; I1, springing theY arms to.- hold the blade in tensions,ancl-l the wing nuts 20A are tightened. By use of the Vclamps-oneachend, the arms ci the frame can be made more nearly Parallel, therebyproviding e betterar-ir 0e the saw frame wheninmse and also to provideless tendency for the `blade` lclamps to slide toward positionI.3".-'I,3iwhi le the saw isili use.

It will be seen that the present invention provides for rapid and easy`changing,v of` vsaw blades by providing that suoliVV blades be attachedto the saw' frame, by aclamp which permits4 ready assembly and di niblywithoutV requiringfany particular mechanical skill or I'ih'ysicalvstrength; lt will,be,'understpodv that A mediictiens may be made in thedesign and arrangement of the parts without departing from the scope ofthis invention, which is intended to be limited only as required by thefollowing claim.

What is claimed is:v

In a saw provided with a substantially bowshaped exible tubular frameterminating in two diverging arms, `and asaw blade of 4a length adaptedto be connected to. opposite, outer ends of said bow-shaped frame whensaid frame is i inA a compressed, exed position with means for anges arepressed` tightly on either side of saidv saw blade, is less than theexternal diameter of said tubular frame portion encircled thereby.

- Y HENRY E. HULL. Referentes Cited in the nie or this patent UNITEDlSTATES PATENTS Number Name I Date 1,540,201 Valtzn..Y ,June 2, 19252,089,105 Anderson Aug. 3, 1937 'FOREIGN PATENTS Number Country l Date19,905 ,Great Britain of 1903, 39,090 Norway T June 16, 19,24 96,936`

Sweden Sept. 26, 1939

